nightTab extension broken in 6.5.1

[ezstewart96]

What happened?

nightTab extension automatically uninstalled itself when updating to 6.5.1, and trying to install from official addons page gives an error "The add-on downloaded from this site could not be installed because it appears to be corrupt." Building the addon from source gives the same results. It has not been updated recently and works as expected in Firefox 132.0.1.

Reproducible?

• I have checked that this issue cannot be reproduced on Mozilla Firefox.

Version

G6

What platform are you seeing the problem on?

Windows

Relevant log output